Brake-shoe.



G. H. FAHRENBRUCH.

BRAKE SHOE.

APPLlcATIoN man Mcm. :911.

Patented Apr. 30,1918

ammmwmnmm which may be also used if desired to add rigidity to the steel back. This steel back is then placed in a mold (not shown) and around the same is poured the metal to form a cast shoe as shown` in Figs. 1, 4 and 5.

As may be seen in Fig. 5, by having the arms of the keepers 4 and 10 extend outwardly beyond the reinforcing strip, they present more surfaces to be embedded in the shoe 15.

Referring to Fig. 1 for the moment, there is shown a conventional M. C. B. brake head showing my improved shoe secured thereto. By providing the additional keepers or lugs as shown the central lug of course comes in its usual position while the upper additional lug comes directly under the brake hanger. The other lug, that is the lower one 10, will contact with the face of the brake head, the

-three lugs forming the interlocking surfaces with the projections on the face of the brake head which is naturally more preferable than simply having the one central lug 3, which form is now generally in use.

Also by providing additional lugs or keepers such as 4 and 10, should the brake shoe crack transversely at a point beyond either center, it will be noticed that there is still an additional lug or keeper, either 4 or 10, to retain the shoe in position so that the same will not drop under the wheels as is sometimes the case where a brake shoe has only one central keeper or lug. Furthermore, the reinforcing strips will hold the additional keepers 4 and 10 in position and even should the longitudinal arms. 1 and 2 crack or break, still the reinforcing strips will tend to hold the shoe and reinforcing back together.

From the foregoing it will be seen that I have constructed a reinforced brake shoe having a particular form of steel back that in itself is stronger and more rigid than the ordinary back and furthermore by roviding additional lugs or keepers the bra e shoe has three points of locking means instead of one, so that evenshould the'brake shoe break transversely throughout any part of its length in all probability there will be one holding means that will support the broken part until the end ofthe run or to such time as the same may be conveniently changed.

By providing the retaining lugs or keepers as shown 1n my construction, the shoe may be use d with most, if not all, of the M. C. B. heads now in general use.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1'. A brake shoe having a steel back inserted therein comprising two longitudinallyA extending arms, a central lug or keeper extending between said arm, additional lugs or keepers located on either side of said central lug or keeper and a rcinforcing strip connecting the two additional lugs or keepers.

2. A brake shoe comprising in part a steel back having two longitudinally extending arms, a central lug or keeper fastened to said arms, additional keepers located .above and below saidbeforementioned keeper or lug and two reinforcing strips Vlocated on the outer sides of said longitudinal arms, the ends of said additional keepers or lugs passing through said reinforcing strips and held in position thereby.

3. A brake shoe comprising longitudinally extending arms, a central lu or keeper secured to both of said arms, a ditional keepers located one on either side of said centrally located lug or keeper, reinforcing strips on each side of said longitudinally extending arms having their ends encircling said longitudinall extendin arms and provided with slots erein, ad itional keepers located one above and one below said central keeper and havin their ends passing under said longitudina ly extending arm and through the slots in said reinforcn strips and also extending out beyond sai reinforcing strips.

4. Abrake shoe comprising a shoe pro er, a steel back embedded in the u per surface thereof, said steel back provide with a central lug or keeper and two additional keepers, reinforcing stri s fastened to said back and also securing t e additional keepers in position, end strips connectin the two said arms, one of said additional eepers adapt- 10( ed to come directly beneath the brake hanger when said shoe is placed on a brake head.

In testimony whereof I aiiix my signature.

GEORGE H. FAHRENBRUCH. 

